Nummer: 18420
| Area : | Western Area |
| Sea area : | English Channel |
| Date of attack : | 23.08.1944 |
| Time of attack : | 12:30 |
| Nationality of U-boat : | German |
| U-boat : | U 989 |
| Commander : | Rodler von Roithberg |
| Grid : | BF 3512 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 7000 BRT |
| presumed result : | damaged |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | unknown |
| Date of observation : | 23.08.1944 |
| Nationality of target : | American |
| Actual type of target : | Steam Freighter |
| Name of target : | Louis Kossuth |
| Year of launch : | 1943 |
| Actual tonnage : | 7176 BRT |
| Actual result : | damaged |
| Position of target : | 50.14n 01.41w |
| Convoy : | unknown |